Combined grate-bar and feed-water heater



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H. D. WENDT. ,GOMBINBD GRATE BAR AND FEED WATER HEATER. No. 478,726. Patented July 12, 1892.

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. H. D. WENDT. COMBINED GRATB BAR AND FEED WATER HEATER.

No. 478,726. Pat.entedJ u1y 12, 1892..

WITNESSES:

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UN TED STATES PATENT OF ICE.

HENRY D. WENDT, OF HOBOKEN, NEW JERSEY.

COMBINED GRATE-BAR AND FEED-WATER HEATER.

SPECIFICATION forming part of Letters Patent No. 478,726, dated July 12, 1892.

Serial No. 386,936. (No model.) i

To atZZ whom it may concern;

Be it known that I, HENRY D. WENDT, a citizen of the United States, residing at Hoboken, in the county of Hudson and State of New Jersey, have invented a certain new and useful Improvement in Combined Grate-Bars and Feed-Water Heaters, of which the following is a specification.

The main object of my invention is to pro vide grate-bars for steam-boiler furnacesor other furnaces which will be simple, efficient, and comparatively inexpensive in construction; and it consists in constructing grate bars in tubular form, so that water or other cooling fluid may be passed therethrough, thus preventing the burning and warping of the bars and preventing the clinkers from adhering thereto. By the use of my invention I also provide a simple and efficient form of feed-water heater when water is used as the cooling medium. The grate-bars can be constructed to be either movable or stationary. In carrying my invention into effect I construct the grate-bars preferably of wroughtiron pipe or malleable iron, and prefer to use water as the cooling medium, the grate-bars thus forming a simple form of feed-water heater. The series of pipes are connected together in such manner as will permit the water to flow through them successively. 'I also provide means for shaking the'grate-bars, and

prefer to couple alternate pipes together.

'Thus one set may be made movable and the other stationary, or both may be made to move either separately or in opposite directions, or the pipes may be coupled together to form a number of sections, and all or part of them being made movable. The water for cooling the tubes I prefer to take direct from the main supply-that is, before passing through the boiler or auxiliary Vessel-and where the waterpressure is not sufficient I provide means for forcing it through the tubes in order to keep up a constant circulation. I connect the outlet of the grate-bars with the ordinary condenser or feed-Water supply, thus utilizing the grate-bars as a feed-water heater; or I may instead provide a tank for receivin g the heated Water and again pass it through the bars after having out 01f the main supply until it reaches a temperature close to in this instance that the water be forced through the grate-bars at such rate as will prevent itbecoming heated to the point at which scales are formed.

My invention may also be applied to kitchen-ranges mainly for the purpose of making hot water. Instead of using the ordinary water back or coil in the range,l provide grate-bars of the above general description and connect the same with the water-tank in the usual manner. The gratein this instance can also be made movable.

My invention is'illustrated in the accompanying drawings, in which 7 Figure l is a front elevation of a steamboiler with my invention applied thereto. Fig. 2 is a plan view showing the grate-bars and connections, portions being in section;

and Fig. 3 is a side view of the furnace, being a section on the line a: m of Fig. 2.

l is an ordinary boiler supported in the usual manner.

2 is the fire-box, having crossbars 3 3, upon which are supported the hollow grate-bars 4 4E. The bars 4 are coupled to the connectingtube 5, which constitute the movable section of the grate. The bars 4: are coupled to the connecting-tube 6 and constitute the stationary section of the grate. The connecting-tube 5 is connected to the water-supply pipe '7 by the swivel-jointed section 8. The pieces of tubing between the elbows in the section have a slight play, so thatin inovlng the grate-bars the couplings will not be strained. The connection to the stationary connecting-tube 6 is through pipe 9. The outlets from the gratebars are at 10 10. The outlet 10 has a similar swivel-jointed section (not shown) as the inlet 7. The grate-bars are held down upon the supporting-bars 3 3 at the ends by the projecting part 11 and the dead-bar 12. (Omitted in Fig. 2.) Pivoted upon the arm 13 is the lever 14, which has a sliding connection at 15 with the connecting-tube 5, whereby the grate-bars 4 can be moved back and forth. The grate-bars, being supported upon crossbars and free at both ends, passing under the dead-bar and under a projection from the bridge-Wall, are free to expand and contract, which greatly reduces warping. The connecting-tube 5 has partitions 16, (shown in Fig. 2,) forming chambers therein, so that the water will pass through the tubes successively. The connecting-tube 6 has similar partitions arranged therein, but are not shown in the drawings.

The various connections can be accomplished in numerous Ways without departing from the spirit of my invention. For instance, the water-supply connection to the connecting-tube 5 may be by a section of steam-hose, or the grate-bars may be coupled together by elbows or bends instead of by the tubes 5 and 6, or the grate-bars may be made of single lengths of tubing coupled together by elbows instead of a double tube with the return-bend.

In making the grate-bars of malleable iron they may be formed as single bars with two passages therein.

I am aware that hollow grate-bars for passing a cooling fluid therethrough have been proposed, and therefore do not lay claim, broadly, to the use of such a grate-bar.

What I claim is- 1. In a furnace-grate, the combination of a series of tubular grate-bars, water inlet and outlet pipes connected to said bars by a yielding connection, and means for shifting said gratre-bars back and forth, substantially as set fort L 2. In a furnace-grate, the combination of a series of tubular grate-bars, water inlet and outlet pipes connected to said series of bars ./b- ','-a-yielding connection, cross-bars support ing said tubular grate-bars, and means for shifting said grate-bars back and forth upon said cross-bars, substantially as set forth.

In a furnacegrate, the combination of a series of tubular grate-bars, a cross-head or connecting-tube connecting said grate-bars, water inlet and outlet pipes connected to said cross-head by a yielding connection, crossbars supporting said grate-bars, and means for shifting said grate-bars back and forth upon said cross-bars, substantially as set forth.

4. In a furnace-grate, the combination of a series of tubular grate-bars, a cross-head or connecting-tube connecting said grate-bars, water inlet and outlet pipes connected to said cross-head, chambers arranged in said crosshead, whereby the water is caused to flow through said grate-bars successively, said inlet and outlet pipes being connected to said cross-head by a yielding connection, crossbars supporting said grate-bars, and means for shifting said grate-bars back and forth upon said crossbars, substantially as set forth.

5. In a furnace-grate, the combination of a series of tubular grate-bars arranged in two or more sections, a cross-head or connectingtube connecting the bars of each section, water inlet and outlet pipes connected to said cross-heads by yielding connections, crossbars supporting said grate-bars, and means for shifting said grate-bars back and forth upon said cross-bars, substantially as set forth.

6. In a furnace-grate, the combination of a series of tubular grate-bars supported upon cross-bars and arranged in one or more stationaryv sections and one or more movable sections, a cross-head or connecting-tubeconnectin g the bars of each section, water 1nlet and outlet pipes connected to thecross-heads of the stationary sections, water inlet and outlet pipes connected to the cross-heads of the movable sections by a yielding connect-ion, and means for shifting said movable sections back and forth upon said cross-bars,substantially as set forth.

7. In a furnace-grate, the combination of a series of tubular grate-bars supported upon cross-bars and arranged in one or more sta=- tionary sections and one or more movable sections, a cross-head or connecting-tube'connecting the bars of each section, water 1nlet and outlet pipes connected to the cross-heads of the stationary sections, water inlet and outlet pipes connected to the cross heads of the movable sections by a yielding connection, chambers arranged in said cross-heads, whereby the water is caused to How through said grate-bars successively, and means for shifting said movable sections back and forth upon said cross bars, substantially as set forth.

8. In a furnace-grate, the combination of the double tubes 4c and t, constituting the grate-bars, cross-heads 5 and 6, connecting together the tubes 4 and 4', respectively, Watersupply pipe 7, a yielding connection from said pipe 7 to the cross-head 5,a rigid connection from said pipe 7 to the cross-head 6, cross-bars 3, supporting the grate-bars, and means for shifting the grate-bars back and forth upon said cross-bars, substantially as set forth.

9. In a furnace-grate, the combination of the double tubes at and 4', constituting the grate-bars, cross-heads 5 and 6, connecting togeth'er the tubes 4 and 4', respectively, ch-am bers arranged in said cross-heads, water-sup-- ply-pipe 7, a yielding connection from said pipe 7 to the cross-head 5, a rigid connection from said pipe 7 to the cross-head 6, crossbars 3, supporting the grate-bars, and means for shifting the grate-bars back and forth upon said cross-bars, substantially as set forth.

10. The combination, with a steam-boiler, of a furnace-grate composed of the double tubes 4 and 4', cross-heads 5 and 6, having chambers formed therein, water-supply pipe 7, a swivel-jointed section 8, connecting-the said pipe 7 with the cross-head 5, a rigid c011- nection 9, connecting said pipe 7 with the and forth upon cross-bars. 3, substantially as and for the purpose set forth. I0

This specification signed and witnessed this cross-head 6, outlets 10 and 10, connecting 21st day of March, 1891. said tubes 4 and 4' with the condenser or feed-water supply, and the lever 14:, pivoted on the arm 13 and connected with the crosshead 5, whereby the tubes 4 are shifted back HENRY D. WENDT, Witnesses:

JAMES H. PHIPPS, W. PELZER. 

